A retinal detachment can occur at any age and is considered a medical emergency. A detached retina is a serious sight-threating event. In fact, if not treated promptly, a retinal detachment can cause permanent vision loss. The retina is a light sensitive layer of tissue that lines the back of the eyes. When light passes through the eyes, the retina converts it into impulses that travel through the optic nerve to the brain, where they are interpreted as the images we see. Needed for reading, driving, and seeing fine detail, a healthy, intact retina is key to clear vision.